Childhood villonodular synovitis.
D002648:Child; D002675:Child, Preschool; D005260:Female; D006392:Hemangioma, Cavernous / Q000150:complications* / Q000473:pathology; D006801:Humans; D007717:Knee / Q000473:pathology; D007719:Knee Joint; D008297:Male; D011859:Radiography; D013585:Synovitis / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology